Class: Dragonfly::Plugin::Cache::Local

Inherits:
Object
  • Object
show all
Defined in:
lib/dragonfly/plugin/cache/local.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(public_path:, cache_path: 'dragonfly-cache') ⇒ Local

Returns a new instance of Local.



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# File 'lib/dragonfly/plugin/cache/local.rb', line 18

def initialize(public_path:, cache_path: 'dragonfly-cache')
  @public_path = public_path
  @cache_path = cache_path
  FileUtils.mkdir_p(File.join(public_path, cache_path))
  @cache = read_disk_cache
end

Instance Attribute Details

#cache ⇒ Object (readonly)

Returns the value of attribute cache.



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# File 'lib/dragonfly/plugin/cache/local.rb', line 16

def cache
  @cache
end

#cache_path ⇒ Object (readonly)

Returns the value of attribute cache_path.



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# File 'lib/dragonfly/plugin/cache/local.rb', line 16

def cache_path
  @cache_path
end

#public_path ⇒ Object (readonly)

Returns the value of attribute public_path.



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# File 'lib/dragonfly/plugin/cache/local.rb', line 16

def public_path
  @public_path
end

Class Method Details

.extract_public_path(path:, public_path:) ⇒ Object 



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# File 'lib/dragonfly/plugin/cache/local.rb', line 11

def extract_public_path(path:, public_path:)
  path[/#{public_path}(.+)/, 1]
end

.extract_sha(path:) ⇒ Object 



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# File 'lib/dragonfly/plugin/cache/local.rb', line 7

def extract_sha(path:)
  path.to_s.split('/')[-2]
end

Instance Method Details

#call(app, options = {}) ⇒ Object 



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# File 'lib/dragonfly/plugin/cache/local.rb', line 44

def call(app, options = {})
  app.server.before_serve do |job, env|
    store(job)
  end

  app.define_url do |app, job, opts|
    url_for(app, job, opts)
  end
end

#job_cache_path(job) ⇒ Object 



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# File 'lib/dragonfly/plugin/cache/local.rb', line 34

def job_cache_path(job)
  File.join(public_path, cache_path, job.sha, [job.basename, job.ext].join('.'))
end

#read_disk_cache ⇒ Object 



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# File 'lib/dragonfly/plugin/cache/local.rb', line 25

def read_disk_cache
  c = {}
  Dir[File.join(public_path, cache_path, '*', '*')].each do |path|
    sha = self.class.extract_sha(path: path)
    c[sha] = self.class.extract_public_path(path: path, public_path: public_path)
  end
  c
end

#store(job) ⇒ Object 



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# File 'lib/dragonfly/plugin/cache/local.rb', line 38

def store(job)
  fullpath = job_cache_path(job)
  @cache[job.sha] = self.class.extract_public_path(path: fullpath, public_path: public_path)
  job.to_file(fullpath, mode: 0644) unless File.exists?(fullpath)
end

#url_for(app, job, opts) ⇒ Object 



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# File 'lib/dragonfly/plugin/cache/local.rb', line 54

def url_for(app, job, opts)
  sha = job.sha
  if (path = @cache[sha])
    path
  elsif (fullpath = Dir[File.join(public_path, cache_path, sha, '*')].first)
    @cache[sha] = self.class.extract_public_path(path: fullpath, public_path: public_path)
  else
    app.server.url_for(job, opts)
  end
end